Hey Hackers!\Welcome to HackerNoon Projects of the Week, where we spotlight standout projects from the Proof of Usefulness Hackathon, HackerNoon’s competition designed to measure what actually matters: real utility over hype.\This week, we’re excited to share another set of unbelievable projects that have proven their worth and usefulness: Ravasend, polluSensWeb, and Nullmail.\:::tipWant to see your own project spotlighted here?Join the Proof of Usefulness Hackathon to get on our radar.:::\\Meet the Projects of The WeekRavasendhttps://hackernoon.com/ravasend-earns-a-49-proof-of-usefulness-score-by-building-instant-crypto-to-fiat-settlement-for-emerging-markets?embedable=trueGetting paid in crypto is quick and efficient. But unfortunately, most places do not accept crypto as a legitimate form of payment; good luck trying to pay your rent with crypto. Ravasend saw this problem and decided to do something about it. Ravasend allows its users to convert crypto into legitimate, local currency.\The type of crypto it accepts includes BTC, ETH, USDT, and more. Your Crypto could then be converted into Nigerian Naira, Ghanaian Cedis, and Kenyan Shillings. And, on Ravasend’s website, it states that there will be more markets coming soon.\ Now’s a good time for Ravasend to exist because legacy banking infrastructure in emerging markets often lags behind the speed of the global crypto economy, creating a critical need for a bridge that ensures funds are available immediately for real-world necessities. - Emmanuel Isika, Ravasend\Proof of Usefulness: +49/1000\ :::tipSee Ravasend’s full Proof of Usefulness ReportRead their story on HackerNoon:::\polluSensWebhttps://hackernoon.com/pollusensweb-earns-a-46-proof-of-usefulness-score-by-building-a-browser-based-uart-sensor-tool?embedable=trueAir quality is a very important topic when it comes to the future of this planet. The more we care about and pay attention to this serious matter, the more we can do to improve it. That’s why it’s good that polluSensWeb exists. It’s a tool that can read and plot data from UART air quality sensors. According to its website, it makes it easy to organize this data by allowing users to have multiple simultaneous charts, has frame parsing, and allows for a full CSV export.\It also supports 35 sensors, ranging from different Plantower and YYS sensors, plus many more. And the best part is that this list is ever-expanding.\ Now’s a good time for polluSensWeb to exist because it lowers the barrier to entry for citizen science and education by removing the need for complex driver installations and dedicated software just to visualize sensor data. - Aleksei Tertychnyi, polluSensWeb\Proof of Usefulness: +46/1000\ :::tipSee polluSensWeb’s full Proof of Usefulness ReportRead their story on HackerNoon:::\NullMailhttps://hackernoon.com/nullmail-privacy-first-disposable-email-that-actually-works?embedable=trueIt’s annoying how, anytime you visit a website or download an app, they immediately want you to sign up and create an account by using your email. This makes your email inbox a wasteland of spam from an array of different companies. But it doesn’t have to be this way. Nullmail is here to save you and your inbox.\Nullmail is a privacy tool that allows users to generate a disposable email. No data or personal information required; just go to the website, and an email will be waiting for you immediately.\Apart from company spam being annoying, it’s also dangerous for all these companies to have your email address since they all seem to have privacy breaches every month or so. With Nullmail, that can be a problem of the past.\ It helps users protect their privacy, avoid spam, and quickly verify accounts without exposing their real email address. Built with a minimal, privacy-first architecture, it prioritizes usefulness over growth or data collection. - Gabor Koos, NullMail\Proof of Usefulness: +76/1000\ \:::tipSee NullMail’s full Proof of Usefulness ReportRead their story on HackerNoon:::\\Want to submit your project to the Proof of Usefulness hackathon?What is Proof of Usefulness?It's our answer to a web drowning in vaporware and empty promises. We evaluate projects based on: \n ▪️ Real user adoption \n ▪️ Sustainable revenue \n ▪️ Technical stability \n ▪️ Genuine utility \n \n Projects score from -100 to +1000. Top scorers compete for $20K in cash and $130K+ in software credits.\You’ll be in good company. The hackathon is backed by teams who ship production software for a living - Bright Data, Neo4j, Storyblok, Algolia, and HackerNoon.\ \What happens when you submit:1. Get your free Proof of Usefulness score instantly \n 2. Your submission becomes a HackerNoon article (published within days) \n 3. Compete for monthly prizes \n 4. All participants get rewardsComplete guide on how to submit here.\:::tip👉 Submit Your Project Now!:::\That’s all for this week.Until next time, hackers!